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Sulfonated long chain alpha-olefin copolymer and its prepn and use

An olefin copolymer and sulfonated long-chain technology, which is applied in the field of sulfonated long-chain alpha-olefin copolymer and its preparation, can solve the problem of weak adhesion, easy to be washed away by rolling water droplets, and surface energy of polyethylene film. lower problem

Inactive Publication Date: 2007-08-22
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low surface energy of the polyethylene film, the adhesion of the inorganic hydrophilic colloid and the hydrophilic organic compound to the polyethylene film is weak, and it is easy to be washed away by rolling water droplets, resulting in the anti-fog drop of the anti-fog polyethylene film. short life

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0017] The preparation steps of sulfonated long-chain α-olefin copolymer are as follows:

[0018] 1) Copolymerize long-chain α-olefins and styrene as monomers to obtain styrene-long-chain α-olefin copolymers, and the catalytic system is TiCl 4 / MgCl 2 A mixture of ID-supported spherical catalysts, triisobutylaluminum and diphenyldimethoxysilane, wherein ID is diisobutyl phthalate or di-n-butyl phthalate;

[0019] 2) Dissolve 0.5-1 gram of the above-mentioned copolymer in 50 milliliters of o-dichlorobenzene, heat up to 100° C., stir vigorously, and slowly add 50 milliliters of 50-98% concentrated sulfuric acid dropwise. After sulfonation for 3-72 hours, a sulfonated long-chain α-olefin copolymer is obtained.

[0020] The preparation steps of long-acting anti-fogging and dripping agricultural film: prepare a dilute solution of sulfonated long-chain α-olefin copolymer, spin-coat it on the surface of low-molecular-weight polyethylene film, and obtain a long-acting anti-fogging a...

Embodiment 1

[0029] 1) Completely remove oxygen and water in the reactor, add 32 milliliters of n-heptane, 4.49 grams of 1-octene, 1.04 grams of styrene, 0.50 grams of triisobutylaluminum, 0.056 grams of diphenyldimethoxysilane , 0.06 g of the main catalyst, and polymerized at 50° C. for 2 hours to obtain 0.56 g of styrene-1-octene copolymer. The content of styrene structural unit in this copolymer is 5.5% (mole percentage composition), and molecular weight is 1.15 * 10 6 g / mol

[0030] 2) Dissolve 0.5 g of the above copolymer in 50 ml of o-dichlorobenzene, heat up to 100° C., stir vigorously, and slowly add 50 ml of 50-98% concentrated sulfuric acid dropwise. After sulfonation for 3 hours, a sulfonated long-chain α-olefin copolymer was obtained with a sulfonation degree of 1.2% (mole percent).

Embodiment 2

[0032] 1) Completely remove oxygen and water in the reactor, add 32 milliliters of n-heptane, 4.2 grams of 1-dodecene, 2.6 grams of styrene, 0.25 grams of triisobutylaluminum, 0.028 grams of diphenyl dimethoxy Silane and 0.06 g of the main catalyst were polymerized at 70° C. for 2 hours to obtain 0.75 g of styrene-1-dodecene copolymer. The content of styrene structural unit in this copolymer is 33.1% (mol percentage composition), and molecular weight is 8.32 * 10 5 g / mol

[0033] 2) Dissolve 1 gram of the above-mentioned copolymer in 50 milliliters of o-dichlorobenzene, heat up to 80° C., stir vigorously, and slowly add 50 milliliters of 50-98% concentrated sulfuric acid dropwise. After sulfonation for 3 hours, a sulfonated long-chain α-olefin copolymer was obtained with a sulfonation degree of 3.3% (mole percent).

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Abstract

The present invention discloses one kind of sulfonated long chain alpha-olefin copolymer and its preparation process and use. The preparation process includes the following steps: 1. adding triisobutyl aluminum, diphenyl dimethoxy silane, spherical polypropylene catalyst, long chain alpha-olefin and styrene into n-heptane solvent to polymerize styrene-long chain alpha-olefin copolymer; and 2. dissolving the styrene-long chain alpha-olefin copolymer in o-dichlorobenzene through heating and stirring, and dropping concentrated sulfuric acid slowly to sulfonate and obtain sulfonated long chain alpha-olefin copolymer. The preparation process is simple and low in production cost, and the sulfonated long chain alpha-olefin copolymer may be used in preparing agricultural film with excellent surface hydrophilicity, long service life and other advantages.

Description

technical field [0001] The invention relates to a sulfonated long-chain alpha-olefin copolymer and its preparation method and application. Background technique [0002] Since polyethylene (especially low-density polyethylene) is cheap, lightweight and easy to process, it is widely used as a covering material for greenhouses and the like. Due to the hydrophobicity of the surface of the polyethylene film, when the surface temperature drops below the dew point temperature of the air in the greenhouse, the moisture in the air will be atomized on the surface of the polyethylene film. The adverse effects of fog droplets on the surface of polyethylene film on crop production are mainly manifested in three aspects: ① fog droplets cause light scattering and refraction, reducing the light transmittance of covering materials; On the surface of crops, it will lead to increased diseases of leaves, stems, buds, flowers, and fruits, affecting crop quality and yield; ③The lens focusing eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/36C08F210/00C08F212/08C08J5/18
Inventor 傅智盛范志强邓建徐君庭王齐
Owner ZHEJIANG UNIV
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